Add files

src/util.h

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+/*
+ * This file is part of the Monero P2Pool <https://github.com/SChernykh/p2pool>
+ * Copyright (c) 2021 SChernykh <https://github.com/SChernykh>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+namespace p2pool {
+
+template<typename T> struct not_implemented { enum { value = 0 }; };
+
+struct nocopy_nomove
+{
+	nocopy_nomove() = default;
+	nocopy_nomove(const nocopy_nomove&) = delete;
+	nocopy_nomove(nocopy_nomove&&) = delete;
+	nocopy_nomove& operator=(const nocopy_nomove&) = delete;
+	nocopy_nomove& operator=(nocopy_nomove&&) = delete;
+};
+
+template<typename T>
+struct ScopeGuard
+{
+	explicit FORCEINLINE ScopeGuard(T&& handler) : m_handler(std::move(handler)) {}
+	FORCEINLINE ~ScopeGuard() { m_handler(); }
+
+	T m_handler;
+
+	// Disable copying/moving of ScopeGuard objects
+
+	// We can't declare copy constructor as explicitly deleted because of copy elision semantics
+	// Just leave it without definition and it'll fail when linking if someone tries to copy a ScopeGuard object
+	ScopeGuard(const ScopeGuard&);
+
+private:
+	ScopeGuard& operator=(const ScopeGuard&) = delete;
+	ScopeGuard& operator=(ScopeGuard&&) = delete;
+};
+
+template<typename T> FORCEINLINE ScopeGuard<T> on_scope_leave(T&& handler) { return ScopeGuard<T>(std::move(handler)); }
+
+#define ON_SCOPE_LEAVE(x) auto CONCAT(scope_guard_, __LINE__) = on_scope_leave(x);
+
+struct MinerCallbackHandler
+{
+	virtual ~MinerCallbackHandler() = 0;
+
+	virtual void handle_tx(TxMempoolData& tx) = 0;
+	virtual void handle_miner_data(MinerData& data) = 0;
+	virtual void handle_chain_main(ChainMain& data, const char* extra) = 0;
+};
+
+template<typename T>
+static FORCEINLINE bool from_hex(char c, T& out_value) {
+	if ('0' <= c && c <= '9') { out_value = static_cast<T>(c - '0'); return true; }
+	if ('a' <= c && c <= 'f') { out_value = static_cast<T>((c - 'a') + 10); return true; }
+	if ('A' <= c && c <= 'F') { out_value = static_cast<T>((c - 'A') + 10); return true; }
+	return false;
+}
+
+template<typename T, bool is_signed> struct abs_helper {};
+template<typename T> struct abs_helper<T, false> { static FORCEINLINE T value(T x) { return x; } };
+template<typename T> struct abs_helper<T, true>  { static FORCEINLINE T value(T x) { return (x >= 0) ? x : -x; } };
+
+template<typename T> FORCEINLINE T abs(T x) { return abs_helper<T, std::is_signed<T>::value>::value(x); }
+
+template<typename T, typename U>
+FORCEINLINE void writeVarint(T value, U&& callback)
+{
+	while (value >= 0x80) {
+		callback(static_cast<uint8_t>((value & 0x7F) | 0x80));
+		value >>= 7;
+	}
+	callback(static_cast<uint8_t>(value));
+}
+
+template<typename T>
+FORCEINLINE void writeVarint(T value, std::vector<uint8_t>& out)
+{
+	writeVarint(value, [&out](uint8_t b) { out.emplace_back(b); });
+}
+
+template<typename T, size_t N> FORCEINLINE constexpr size_t array_size(T(&)[N]) { return N; }
+
+[[noreturn]] void panic();
+
+void make_thread_background();
+
+extern std::atomic<int32_t> num_running_jobs;
+
+} // namespace p2pool
+
+template<>
+struct std::hash<p2pool::hash>
+{
+	FORCEINLINE size_t operator()(const p2pool::hash& value) const
+	{
+		uint64_t result = 0xcbf29ce484222325ull;
+		for (size_t i = 0; i < p2pool::HASH_SIZE; ++i) {
+			result = (result ^ value.h[i]) * 0x100000001b3ull;
+		}
+		return static_cast<size_t>(result);
+	}
+};